Search Media by Alt Text Too
Makes the Media Library search, in both the grid and list views and the media picker, also match images by their alt text, which often describes the image better than the file name.
Opens WPIDE on
Code
add_filter( 'posts_search', function ( $search, $query ) {
global $wpdb, $pagenow;
$is_media_screen = 'upload.php' === $pagenow || ( wp_doing_ajax() && isset( $_REQUEST['action'] ) && 'query-attachments' === $_REQUEST['action'] );
if ( ! is_admin() || '' === $search || ! $is_media_screen || 'attachment' !== $query->get( 'post_type' ) ) {
return $search;
}
$term = trim( (string) $query->get( 's' ) );
if ( '' === $term ) {
return $search;
}
$match = $wpdb->prepare(
"{$wpdb->posts}.ID IN ( SELECT post_id FROM {$wpdb->postmeta} WHERE meta_key = '_wp_attachment_image_alt' AND meta_value LIKE %s )",
'%' . $wpdb->esc_like( $term ) . '%'
);
return preg_replace( '/^\s*AND\s*/', ' AND ( ( ', $search, 1 ) . " ) OR $match )";
}, 10, 2 );Notes
Only adds matches; normal title, caption and file name searches keep working.
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